interstellar medium
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The Cosmic Microwave Background Radiation
What if I told you that this was an actual image of the night sky? Well…alright, I admit it’s more like a map. Specifically, a map of the cosmic microwave background radiation, often known simply as the CMB. This is…
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The Milky Way Demystified
Alright, people…time to finish off our exploration of the Milky Way Galaxy, our home in the cosmos! For the past nine weeks, we’ve covered everything from how our galaxy was “discovered” to how it may have formed. But there’s so…
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The Composition of the Milky Way
What is our home galaxy made up of? In the broadest sense, it’s made up of stars, clouds of dust and gas, and the mysterious dark matter. We could also get a little more detailed. We could say that it…
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Pulsars as Neutron Stars
For those of you who missed my last couple of posts, allow me to introduce the neutron star: a stellar remnant similar to a white dwarf, but much denser, so dense that its protons and electrons have combined to form…
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What Exactly are Supernovae?
This is one topic I bet you guys have been looking forward to since I first started posting about stellar evolution. Well, I won’t disappoint you! In my last post, we covered how a massive star gets to the point…
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What are Planetary Nebulae?
Meet the planetary nebula, one of the universe’s most gorgeous phenomena. If you’ve ever looked through a telescope, you may have seen one of these before. Through a small telescope, one might look like a little planet — hence the…
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What is Contagious Star Formation?
Recognize this nebula? Yeah…we’re talking about the Orion Nebula again. I know, we already took a tour through the Orion constellation in my last post…but there’s still more to cover about how stars come to life, and Orion is still the…
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The Orion Nebula: A Stellar Nursery
One of my favorite objects to show people at astronomy outreach events is the Orion Nebula. Not only does it reside within a fairly well-known constellation, but it’s a gorgeous sight to see with a good telescope. There’s no time like…
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How are Stars Born?
Astronomers have discovered that the clouds of gas and dust — the interstellar medium (ISM) — found between the stars are made of the same materials as the stars themselves. In fact, hydrogen is the most common element in both…
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Where Did the Interstellar Medium Come From?
Contrary to popular belief, space is not empty. The space between the stars is filled with clouds of dust and gas. And this space — the interstellar medium — is incredibly beautiful and fascinating. I often refer to the interstellar…
